Home / 15,340.68-21,170.76-8,971.38

Finding the Fourth Proportional to 15,340.68, 21,170.76 and 8,971.38

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Solution

The fourth proportional to 15,340.68, 21,170.76 and 8,971.38 is: 12,380.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,340.68 : 21,170.76 = 8,971.38 : x
  2. Step 2: Convert to fraction form
    15,340.68/21,170.76 = 8,971.38/x
  3. Step 3: Cross multiply
    15,340.68x = 21,170.76 × 8,971.38
  4. Step 4: Simplify right side
    15,340.68x = 189,930,932.85
  5. Step 5: Solve for x
    x = 189,930,932.85/15,340.68
  6. Step 6: Final answer
    x = 12,380.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.